RPM's while stopped
#1
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RPM's while stopped
I have a 2011 IS350 and have noticed that while sitting at a red light the RPM's will sometimes jump from around 600 - 700 to over a 1000. It even causes me to have to push on the break a little harder to hold it and then when I let off the break it jumps forward. It seems to be worse when the engine is cold. Do these cars sometimes run a higher RPM when cold to get the engine warm?
#6
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lol @ this thread. When the car is < op temp, it will idle higher because the ISC (idle speed controller) causes it to idle a little higher. This is basically how a choke worked on cars with carbs. It does that so fuel doesn't atomize and condense on the cold metal. Because if it did, it would lean out the Air Fuel.
#7
hmmm... yeah, it's normal for the engine to idle higher when it's warming up. But I don't think I've ever seen it "jump" when at a stop light, nor have I had to hold on to the brakes any harder. Maybe I just have a heavy brake foot with a weak 250 motor?
Does this only happen when the engine is first starting up?
Does this only happen when the engine is first starting up?
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#13
I almost hit a person crossing the street because the rpm's suddenly jumped from like 700-1500. When it's cold my rpm's jump around randomly untill the engine is at operating temp.
#15